Tack-driving machine



(No Model.)

I 3 Sheets-Sheet 2. A. S. LIBBY.

TACK DRIVING MACHINE.

Patented May 5 flv'e'ni'vr:

M16162: 15 La'y,

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RS. Photo-Um (No Model.) 3 Sheets-.-Sheet 3. A. S. LIBBY.

TACK DRIVING MACHINE.

No. 316,986. Patented Ma 5, 1885.

18a XSiLL'ZZy,

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ASA S. LIBBY, OF EVERETT, MASSACHUSETTS.

TACK-DRIVING MACHINE.

SPECIFICATION forming part of Letters Patent No.316,986, dated May 5,1885.

Application filed August 7, 1884. (No model.)

To aZZ whom it may concern.-

Be it known that I, Asa S. LIBBY, a citizen of the United States,residing at Everett, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inTack-Driving Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

My invention relates to improvements in tack-driving machines, and isspecially designed for driving lasting-nails in lasting the uppers ofboots and shoes to their inner soles preparatory to securing the outersole to the vamp and inner sole.

My invention consists of a disk the periphcry of which is provided withgrooves for holding loose nails or tacks, said disk being confined in acasing and adapted to be rotated by the mechanism which lifts thehammer, so as to present or feed a tack or nail into its proper placeeach time the hammer is raised.

My invention consists, further, in certain details in construction,which will be fully described hereinafter, and pointed out in theclaims.

Referring to the drawings, Figure l is a front elevation of my device.Fig. 2 is a side elevation. Fig. 3 is a vertical sectional view. Fig. 4is a top or plan View of the tack-holding disk and easing with thespring for pushing the tack out into the hollow foot to be struck by thehammer. Fig. 5 is a horizontal sectional view taken on the line 00 w ofFig. 2, showing the stop for holding the disk and also the pawl forimparting motion to the disk. Fig. 6 is a top or plan view of a modifiedform of devices for imparting a rotary motion to the tack-holding disk.

A is a box or shell in which is pivoted the tack-carrying disk or plateB, said disk being provided with a series of grooves or depressions, a,formed around its entire periphery for holding the loose tacks.

As before intimated, the disk B is secured in the shell or box A bymeans of a pivot-pin, O, which permits the disk to be rotated within theshell by devices, which will be presently described.

The box or shell A is provided with an extension, D, to which the hammerholding standard or cylinder E is secured by means of screws 12, andalso an opening, 0, in which the point or nose of the nail'tube d issecured by means of a set-screw, e, or in any suitable manner. The boxor shell Ais also provided with a slot through which the pawl f projectsand is held in contact with the disk or plate B by means of thestrap-spring G, secured to the side of the shell A. The box or shell Ais also provided with a perforation, 9, through which a pin, H,projects, the inner end of said pin being held in contact with the edgeof the disk B by means of the spring h, which serves to hold the disk ina condition of rest until the hammer has fallen and the tack is drivenhome. G is a cap or cover to prevent the tacks from falling out when thetool is inverted.

E is a cylinder or tube provided at its lower end with a projection, I,by means of which it is secured to the. extension D of the shell A.

K is a plunger or piston mounted within the cylinder E, to the lower endof which is secured the hammer or driver i, which works through the boreof the nail-tube a, the upper end of the tube being provided with acoiled spring, k, which, when the plunger is released from the liftingdevices, to be hereinafter described, forces the plunger down to drivethe tack or nail which has been previously deposited in the nail-tube.

The upper end of the cylinder E is closed by means of a screw-bolt, L,which may be made long enough toimpinge on the top of the coiled spring70, and by means of which the tension of the spring may be regulated.

A slot, Z, is formed in the cylinder or tube E, through which a latch orcatch, M, projects, said latch being pivoted in a recess, m, in theupper end of the piston or plunger E and forced outward by means of thespring N.

O is a collar adapted to slide on the lower end of the cylinder E, saidcollar being provided with lugs n, to which the lower ends of thehandles 0 0 are secured.

is a bracket or collar adj ustably or otherwise secured to the cylinder'E, and is pro vided with a projection, p, in which is pivoted atogglelever, B, the outer ends of the toggle-lever R being pivoted tothe handles 0. The free or unconfined joint of the toggle-lever R isprovided with a pin,fr, which projects inwardly through the slotZ in thetube or cylinder E, and impinges against the lower side of the latch orcatch M, and carries the plunger up until the catch is forced inward bycoming in contact with the end of the slot Z, when it is freed from thepin 9, and the plunger is forced down by theaction of the spring k.

S is a bow or strap spring sprung in between the two handles and held bythe pins 8, the office of which is to force the upper ends of thehandles outward as soon as released from the pressure of the hand of theoperator, so as to depress the toggle-lever and bring the pin 1' ontothe under side of the catch M in position to raise the plunger again.

I will now proceed to describe the devices by which the disk is turnedwith a step-bystep motion to bring said disk in position for depositinga tack in the nail-tube.

T is a bell-crank lever pivoted to the extension D of the case A, whilethe other end of the lever T is secured to the bar U. The outer end ofthe pawlf, heretofore described, is secured to the bell-crank lever T,so that when said lever is raised the pawl will be thrust forward toturn the disk 13. As before stated, the lower end of the bar U issecured to one arm of the bell-crank lever T, while the upper end ofsaid bar is secured to the bracket 1? by means of a slot, u, andset-screw v.

V is a headed pin or bolt secured to the plunger or piston K, andadapted to work in a slot, w, formed in the cylinder E. The outer end ofthe headed bolt V works in a slot, 3 formed in the bar U, so that whenthe plunger is raised the pinVwill strike against the upper end of theslot 3 raising the bar U, which in turn operates on the bell-crank leverT to operate the pawl f.

a is a spiral spring one end of which is secured to the extension D,while the upper end is secured to the bar U, so that when the plunger isreleased and the blow made for driving the nail the tension of thespring will draw down the bar U, depress the bell-crank lever T, anddraw back the pawl the distance of one notch on the disk B.

B is a strap-spring, one end of which is secured to the side of thecasing A, while-the other or free end projects over and into the casingback of the tack-grooves, so that it will push a tack out of the groovein the disk into the nail-tube as the tacks are brought successivelyagainst said free end of the spring by the rotation of the carrier ordisk.

0 is a strip of metal, which projects inwardly toward the nail-tube andserves as a stop to prevent the spring B from coming in contact with thehammer, and also to prevent the tack from flying out.

In Fig. 6 I have shown devices in a modified form for turning the disk13, in which the pawl Dis provided with a lug or toot-h adapted to fitin serrations formed on the top or bottom of the disk, the pawl beingoperated by a lug or other suitable device on the piston. This form issimply shown as a modification, while other devices will readily suggestthemselves to the skilled mechanic, and will come within the spirit ofmy invention.

The box or shell A, with the serrated disk B therein, is adapted to bereadily taken off or secured to the cylinder or tube E,so that the diskcan be filled with tacks by means of a device which formsthesubjcct-matter of a separate application for a patent filed of evendate with this application, Serial No. 139,900, filed August 7, 1884:.

It will be understood that thewalls of the casing A are continuous,except at a point directly above the nail-tube, so that the nail can beforced from its place in the disk B into the nail-tube by the spring orfinger B.

While I have described my invention as applicable to the driving ofnails or tacks in the lasting of boots and shoes, I do not wish to limitmyself to such use, as the device is applicable and well adapted fortacking down carpets and other like uses. V

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-- 1. In a tack-driving machine, the combination ofthe rotating disk having tack-holding cavities in its periphery, with abell-crank lever and pawl, and a bar operated by the upward movement ofthe tack-driving mechanism to rotate the dislgsubstantially asspecified.

2. The combination, in a tackdriving machine, of the driving-hammer, thespring for forcing the same downward, the togglelever and the pivotedhandles, and the tripping device for freeing the togglelever from thetack-driving hammer, as set forth.

3. In a tack-driving machine, a plunger or piston provided with anail-driving pin on its lower end located within a cylinder or tube, andprovided with a spring-catch, M, in combination with the toggle-leversR, stud r, pivoted handles 0, and spring 70, as and for the purpose setforth.

4. In a tack-driving machine, a disk provided with tack-holding cavitiesin it's periphery inclosed in a casing opening into the tack-holdingtube, in combination with the spring B, and devices, substantially suchas described,for moving the tack-holding disk.

In testimony whereof I affiX my signature in presence of two witnesses.

ASA S. LIBBY.

Witnesses:

W. E. Rocnns, STEPHEN Snow.

IIO

